Array fields with types markdown and code crash

[corysimmons]

Describe the bug

When I create a field like so:

defineField({
  name: 'body',
  title: 'Body',
  type: 'array',
  of: [
    {type: 'markdown'},
    {type: 'code'},
  ],
})

...it crashes the Desk Tool with the following error:

Error: Cannot read properties of undefined (reading 'map')
TypeError: Cannot read properties of undefined (reading 'map')
    at http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:143514:79
    at mountMemo (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:18386:27)
    at Object.useMemo (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:18710:24)
    at useMemo (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-D3K572XJ.js?v=7a0caf95:1094:29)
    at ListArrayInput (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:143514:64)
    at renderWithHooks (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:17740:26)
    at mountIndeterminateComponent (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:20490:21)
    at beginWork (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:21471:22)
    at beginWork$1 (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:25318:22)
    at performUnitOfWork (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-4JRRZWP7.js?v=7a0caf95:24763:20)

Screenshots

Which versions of Sanity are you using?

@sanity/cli (global)          3.18.0 (up to date)
@sanity/code-input             4.1.1 (up to date)
@sanity/eslint-config-studio   2.0.1 (latest: 3.0.1)
@sanity/vision                3.12.1 (latest: 3.18.0)
sanity                        3.12.1 (latest: 3.18.0)

What operating system are you using?

MacOS Ventura 13.5

Which versions of Node.js / npm are you running?

• Node: v16.17.0
• npm: 9.8.1 (but I'm using pnpm@8.9.0)

Run npm -v && node -v in the terminal and copy-paste the result here.

[corysimmons]

This also fails with all my packages updated.

@sanity/cli (global)          3.18.0 (up to date)
@sanity/code-input             4.1.1 (up to date)
@sanity/eslint-config-studio   3.0.1 (up to date)
@sanity/vision                3.18.0 (up to date)
sanity                        3.18.0 (up to date)